Update D3 and Cubism.
Merge pull request #124 from square/update-libraries

Update D3 and Cubism.
0.2.9
move to setImmedate where available
0.2.10
bump mongodb to avoid nextTick usage
0.2.11
mongodb now requires error handling when updating
0.2.12
Merge remote-tracking branch 'upstream/master' into godsflaw
Added median test on floats.

Added a test to see if my problem was due to this field containing
floats.  It was not, but here is the test anyway.